FIELD: chemistry.
SUBSTANCE: invention relates to a method of producing an anticorrosion pigment containing iron phosphate. The method involves adding phosphoric acid solution to iron (II) sulphate solution and neutralising the obtained solution with a product containing amine groups. Neutralisation is carried out until pH 5.5-8 is achieved and a precipitate is obtained. The precipitate is then filtered, washed and dried. The product containing amine groups used is polyethylene polyamine and the precipitate is dried at 50-65°C.
EFFECT: improved anticorrosion properties of the pigment and low production cost thereof.
1 tbl, 3 ex
| Title | Year | Author | Number |
|---|---|---|---|
| METHOD OF PRODUCING PHOSPHATE-CONTAINING PIGMENT | 2010 |
|
RU2448996C2 |
| METHOD OF MAKING IRON PHOSPHATE-CONTAINING PIGMENT | 2007 |
|
RU2389746C2 |
| METHOD OF PRODUCING IRON PHOSPHATE-CONTAINING PIGMENT | 2010 |
|
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| METHOD OF PREPARING SHELL PIGMENT | 1996 |
|
RU2106372C1 |
| METHOD OF REUSING ACIDIC IRON-CONTAINING SOLUTIONS | 1996 |
|
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|
RU2674206C1 |
| METHOD OF OBTAINING IRON OXIDE PIGMENTS | 2017 |
|
RU2656047C1 |
| METHOD OF PRODUCING SODIUM TRIPOLYPHOSPHATE FROM WET-PROCESS PHOSPHORIC ACID | 2008 |
|
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| METHOD FOR PRODUCING MAGNETICALLY SORPTION MATERIAL | 2019 |
|
RU2744806C1 |
| PROCESSING METHOD OF CORROSION INHIBITOR CONTAINING COMPOUNDS OF HEXAVALENT CHROMIUM AND SEA WATER | 2019 |
|
RU2731269C1 |
